I'm trying to add two objects together, one being a face and the other being an apple. I have it all lined up so I can put them together but I can't edit more than one object at once to do so. Is there any way I can edit these both at the same time or combine them into the same object?
With these many vertices, aligning the verts is difficult. If you know how to scupt, try to sculpt the meshes first. Otherwise, make the vertex count the same on both meshes first, then bridge the edge loops and use the shrinkwarp modifier to create a good shape. Attach the blend file if you can, so that we can help you better.